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Llechwedd Slate Caverns, Blaenau Ffestiniog, Gwynedd, United Kingdom
Tel. #: +44 1766 830343
Website: http://www.llechwedd.co.uk;
Gwel Y Don, Trefor, Caernarfon, Gwynedd, United Kingdom
Tel. #: +44 1286 660619
Monffordd Quarry, Penrhyndeudraeth, Gwynedd, United Kingdom
Tel. #: +44 1766 770212